A buddy of mine has an older jeep cherokee. I think it is a '90 or thereabouts. It is still the smaller square looking body w/ an inline 6 cyl? Anyway, the thing is constantly overheating. We have replaced the t-stat (twice), replaced the coolant fill/overflow bottle, and a few other swicthes and sensors. We finally took the t-stat out, and that fixed it...for now. Anybody have any ideas?? Thanks!